Improvement in stoves



P. P. STEWART.

Heating Stove.

Patented April 28, 1863.

PATENT OEEICE.

PHILO l". STEWART, TROY, NEW YORK.

IMPROVEMENT IN STOVES.

Specification forming part of Letters Patent No. 38,361, dated April 28, 1863.

To all whom it may concern,.-

Beit known that I, PHrLo P. STEWART, of the city of Troy, county of Rensselaer, and State of New York, have invented new and useful Improvements in Coal-Stoves; and I do hereby declare that the following is a full and exact description of the construction and operation ofthe same, reference being hereby had to the accompanying drawings, making a part of this specification. y

Like letters represent and refer to like or corresponding parts.

Figure l is a vertical section through the center from the front door to the exitpipe, showing the improvements herein described and set forth. Fig. 2 is a transverse section through the rechamber and oval cylinder, hereinafter described and set forth. Fig. 3 is the front door opening into the re-chamber, and hereinafter described.

The nature of my invention consists in constructin g the cylinder of the fire-chamber with an annular hot-air chamber between the fireb1 ick forming the inside of the said rechamber and the said cylinder which forms the outside part of the said fire-chamber cylinder, which said annular hot-air chamber communicates with the said tirechamber by means of apertures through the said nre-brick, so as to admit therein hot air from said annular chamber, as hereinafter described.

It also consists in the arrangement of a coldair chamber over the frechamber, in connection with a cold-air chamber in the front door opposite thereto, so as to cause the gases or other combustible material arising from said chamber below t) ignite by means thereof.

To enable others skilled in the artto which my invention relates to construct and use the same, I will here proceed to describe the construction and operation thereof, which is as follows, towit:

I construct the outside cylinder c, Figs. 1 and 2, of cast-iron of any diameter, height, or thickness required. On the inside of this cylinder I cast projections i, Figs. 1 and 2, which are of any required number to answer the purpose desired, and upon any part of the said cylinder deemed best, and are for the purpose of supporting the fire-brick d, and at the same time form the annular chamber s, Figs. 1 and 2, which chamber is for the circulation of air admitted thereto from the lower part thereof, which opens direc'ly into the ashpan and air-chamber g, Fig. 1, and which said chamber s extends the whole height of the nre-chamber, and which heats the air entering therein, as aforesaid, preparatory to its introduction, in ahighlyheated condition, into the ire in the fire-chamber through the apertures r in the said lirebrick d, Figs. 1 and 2. The said annular hot-air chamber s will in size depend upon the length of the projections i. VEach tier of tire-brick d is supported by these projections at or near the top and lottom thereof, while between the same may be seen the apertures r at the joints of the said brick, Fig. 1. Highly-heated air is continually entering the said fire-chamber at different points around the same through the said apertures c'. Over and above the said fire-chamber and said hot-air chamber s, I construct the projecting cold-airchamber lr, which has a thick cast-iron plate, m, projecting into the chambert upon any angle desired, through which are apertures n, which communicate from the cold-air chamber k to the chamber below. The cold air enters the said chamber lo through the tube l, which opens into the room where the stove is used. The upper plate, which forms said chamber k, may be in any form desired, and is securely fastened to the plate below. This chamber may extend over as much space as may be found necessary. The outside wall of this chamber ex tends from one side ofthe door w around the top of the lire-chamber brlow and until it reaches the opposite side of the said door, and is seen at w, Fig. 1. Between the said plate m and the said door w there is an open space for the waste product of conbusion to pass into the draft communicating with the exitpipe j. The front door, w, is constructed with a cold-air chamber, z. This chamber is formed by means of mica, o, Figs. 1 and 3, and wiregauze or perforated plate p, Fig. 1. The mica o has small apertures u, Fig. 3, through whichcold air enters in to the chamberz, thence through the wire-gauzep, and, coming in contact with the air which enters the flre-cham ber through the perforated plate fm from the chamber k, and also with the heat arising from the nre-chamber below, causes the gases and smoke arising therewith to ignite and burn, which, in connection with the gas-burning arrangement around the outside of the re chamber, makes a very perfectgas and smoke consumer.. The said doorw is in the Outer cylinder a and directly opposite the said airchamber k.

a a, Figs. l and 2, is the outer cylinder, and may be of any size or shape. This cylinder forms the ues h h, Fig. 2, Which are for the purpose of receiving heat from the tirechamber, and a downward draft, produced by closing the damper y in the funnel A, which connects the chamber t to the tube or eXitpipej. WVith said damper closed the (`rat will be from ihe chamber Or ash-pit g up through the rechamber, in part against the plate m, along the surface of the same, and between the upper end of the same and the door fw, over the top of the chamber 7c, thence down the said flues L h, Fig. 2. When at the bottom thereof, the currents imite and pass up the tube or eXit pipe j. Whe-n this damper yis open', then a direct draft is had, in which case a stronger re is created. The air to supply combustion is admitted to the lower part Of the said fire-chamber in the usual manner. The coal in the fire-chamber rests upon any fire-grate which Will answer the purpose, and which grate is operated in any way or manner deemed best. b b, Figs. l and 2, is an inside cylinder, and is for the protection of the said outer cylinder a from undue heat from the nre-chamber Within the saidcylinder, which is made of sheet-iron.

Having thus described my improvementsin coal-stoves, what I claim, and desire to secure by Letters Patent of the United States, is-

l. The combination of theOut-erire-cylinder c With the annular hot-air chamber s, and With fire-brick perforated and forming the inner fire-cylinder d, in the manner substantially as herein described and set forth.

2. The perforated plate m and cold-air chamber k, in combination with the door w, having therein the cold-air chamber z, the Whole being arranged over the lire-chamber and annular hot air chamber s, substantially as and for the purposes herein described and set forth. y

lu testimony WhereOfI have, on this 19th day of August, 1862, hereunto set my hand.

PHILO P. STEWART.

Vitnesses FRANKLIN SCOTT, MARCUS P. NORTON.

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